FLOOD10696

• County: Larimer
• Community: Larimer County and Incorporated Areas
• Title: FIS - Larimer County and Incorporated Areas - Vol 1
• Date: 12/19/2006
• Prepared For: Larimer County and Incorporated Areas
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

TABLE OF CONTENTS

Volume 1

Page

1. 0 INTRODUCTION............................................................................................................ .. 1

1.1 PUlpose of Study .......... .................................................................................................. 1

1.2 Authority and Acknowledgments .................................................................................. 1

1 . 3 Coo r din a ti 0 n .................................................................................................................. 5

2.0 AREA STUDIED............................................................................................................... 8

2.1 Scope of Study ............................................................................................................... 8

2.2 Communi ty Descri pti on................................................................................................. 9

2.3 Pri nci pal Fl ood Pro bI ems. .. . . . . . . . . . . . .. ... .. ................. .... ... .. .... .. ... .. ... .. .. ..... ....................... 14

2 .4 Fl 00 d Pro t e c ti 0 n Mea sure s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7

3.0 EN G mEERIN G METHOD S ........................................................................................... 19

3.1 Hydro I 0 gi c An al yses .................................................................................................... 19

3 .2 H y dr a u I i c Anal y s e s ...................................................................................................... 21

3 . 3 V e rti c al D at u m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 34

4.0 FLOOD PLAIN MANAGEMENT APPLICATIONS ..................................................... 40

4.1 Fl 00 d B 0 un d ari e s ......................................................................................................... 40

4.2 Fl 00 d way s .................................................................................................................... 42

5.0 mSURANCE APPLICATIONS...... ..... ............. ...... ....... ..... ..... ..... ....... .......... .... ........... 132

6.0 FLOOD mSURANCE RATE MAP ..... ..... ..... ...... ... ................. .......... ... ....... ... ........... ... 133

7 . 0 OTHER S TUn IE S ......................................................................................................... 135

8.0 LOCATION OF DATA ................................................................................................. 139

9.0 BIBLIOGRAPHY AND REFERENCES.... ... ... ... ...... ... ....... ..... ..... ... ................... .......... 139